Well it seems to me that you can have javascript do the work of constructing a command string. No need to type a model's name into a prompt. The following works if you put it in the bookmarks bar in Firefox and click the bookmark when you have entered a room. You could even modify this to extract things like the password hash automatically, have fun!
Code:
javascript:var%20a=document.getElementById('movie');var%20b=a.childNodes[6].value;%20var%20c=b.indexOf('&');var%20d=b.substr(4,c-4);%20alert('rtmpdump%20-r%20"rtmpe://edge2-b.stream.highwebmedia.com/live-edge"%20-W%20"http://chaturbate.com/static/flash/CBV_2p627.swf"%20-p%20"http://chaturbate.com/'+d+'/"%20-C%20S:AnonymousUser%20-C%20S:'+d+'%20-C%20S:2.627%20 -C S:anonymous%20-y%20"anything"%20-o%20'+d+'t.flv%20-T%20"m9z#$dO0qe34Rxe@sMYxx%"')